Human infection with influenza H9N2
Lancet (London, England)
|September 18, 1999
Summary
Two Hong Kong cases of avian influenza A virus subtype H9N2 (H9N2) infection were identified. Evidence suggests prior H9N2 exposure in the general population through blood donor samples.
Area of Science:
- Virology
- Epidemiology
- Public Health
Background:
- Influenza A virus subtype H9N2 is an avian influenza virus with pandemic potential.
- Human infections with H9N2 are typically associated with poultry exposure.
Observation:
- Two cases of human H9N2 infection were clinically characterized in Hong Kong.
- Serum samples from Hong Kong blood donors were analyzed for neutralizing antibodies against H9N2.
Findings:
- The clinical features of the two H9N2 human infections were documented.
- Neutralizing antibodies, indicating prior H9N2 infection, were detected in blood donor samples.
Implications:
- These findings suggest potential H9N2 circulation in the human population in Hong Kong.
- Further surveillance is warranted to monitor H9N2 in both avian and human populations.
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